168 lines
4.8 KiB
Markdown
168 lines
4.8 KiB
Markdown
# Krea2 Prompt Guide
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This document records prompt rules discovered from actual SxCP generator
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outputs tested in Krea2. It is not a generic prompt cookbook. Add a rule only
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when an A/B image comparison shows that the wording improves or breaks Krea2
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behavior.
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## Core Rule
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Krea2 responds best when the prompt gives one clear visual hierarchy:
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1. subject/cast descriptor,
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2. action or pose,
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3. clothing state,
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4. location,
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5. camera/layout,
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6. expression,
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7. composition/crop,
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8. style.
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Avoid letting two sections describe incompatible camera or framing intents.
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## Prompt Output Contract
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- `sxcp_eval_out` must contain only the prompt being tested.
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- Analysis, scoring, and generator notes belong in chat or `sxcp_eval_log`.
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- Keep one experiment variable per cycle when possible.
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- Lock seed, character, location, and camera when testing wording changes.
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- Treat the MCP seed as transport metadata. Preserve it for prompt-only A/B tests
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and do not write it into the visible prompt text.
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## Seed-Controlled A/B Tests
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Use one fixed seed when deciding whether prompt wording helped Krea2. A single
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image can justify a prompt-only retry when the mismatch is obvious, but a
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generator rule needs either repeated evidence or a generated prompt that is
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structurally wrong before rendering.
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When reviewing an eval payload, log:
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- emitted seed,
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- original generated prompt,
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- edited prompt,
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- image failure or improvement,
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- whether the change should stay prompt-only or become a generator patch.
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## Camera And Composition
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### Orbit / Multiangle Camera
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When Krea2 receives an orbit or multiangle camera, avoid selfie-specific wording
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unless the intended camera is actually a handheld or mirror selfie.
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Works better:
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- `lifestyle portrait frame`
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- `creator portrait frame`
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- `outfit-check pose`
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- `wide environmental coworking camera layout`
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- `camera placed several meters away`
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- `full seated body from head to knees`
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- `room depth surrounding the subject`
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Conflicting wording:
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- `selfie frame`
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- `phone selfie`
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- `holding the phone`
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- `creator-shot phone photo`
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- `handheld camera realism`
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Observed result: selfie words pulled a back-right elevated wide shot into an
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arm-length selfie. Removing selfie terms made the image follow the rear-quarter
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view much better.
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### Wide Shots
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Krea2 tends to keep attractive subjects large in frame. To get a real wide or
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environmental frame, be explicit about distance and visible environment.
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Useful phrasing:
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- `camera placed several meters away across the desk aisle`
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- `full seated body from head to knees remains visible`
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- `nearby desk edge, laptop corner, repeated desk rows, and tall-window depth clearly readable`
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- `wide environmental room framing`
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Avoid relying on `wide shot` alone.
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## Location Layout
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Location-aware camera text works when it describes the room around the subject
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without stealing the foreground from the subject.
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For coworking lounge:
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- Keep `warm desks`, `laptop tables`, `glass partition seams`, `repeated desk rows`,
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`plants`, and `tall windows`.
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- Mention foreground anchors only when the camera should actually see them.
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- In POV, keep location anchors beside or behind the bodies, not in the lower
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foreground.
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## Clothing Continuity
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When a softcore outfit is reused in a later branch, name what happens to actual
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outfit pieces instead of using generic fabric language.
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Works better:
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- `denim shorts are pulled aside or removed below the hips`
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- `button-down shirt tied at the waist and fitted bralette remain visible from the same outfit`
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Avoid generic fallback wording:
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- `fabric slipping off`
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- `partly exposed`
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- `outfit pushed aside where needed`
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Use generic wording only when no source outfit exists.
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## POV
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In POV prompts, the visible subject should still be established first. The POV
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participant is the camera viewpoint, not a normal visible cast member.
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Works better:
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- visible subject descriptor first,
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- then POV action,
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- then foreground hands/body/clothing cues.
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For POV clothing, describe only visible body/clothing fragments:
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- `foreground hands, hips, thighs, or lowered waistband`
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- `foreground hands, forearms, sleeves, or torso edge`
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Avoid:
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- full third-person `Man A wears...` phrasing for the POV participant,
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- making `the viewer` the first subject before the visible character is
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established.
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## Style
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Style should describe rendering, not camera mechanics.
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Use style presets to choose between:
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- natural photo,
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- creator/social-media photo,
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- documentary/direct-flash photo,
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- cinematic realism,
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- illustration/comic.
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If a controlled camera is active, avoid style suffixes that imply a conflicting
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camera such as `phone photo` or `handheld selfie`.
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## Guide Update Format
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When adding a new rule, include:
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- observed prompt,
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- observed image failure,
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- edited prompt wording,
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- image improvement or regression,
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- generator path if known,
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- final rule.
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